Thunder Bay Weather: Warm Wednesday, Strong Winds Thursday and Sunshine Friday

Thunder Bay will see morning drizzle and fog Wednesday, west winds gusting to 50 km/h Thursday, and sunny but cooler conditions Friday
THUNDER BAY – WEATHER DESK – September 30, 2026 – Thunder Bay will see a warm start to the three-day forecast, followed by stronger west winds and a cooler finish. Wednesday will bring morning drizzle and fog patches before clearing. Thursday will be sunny but windy, while Friday is expected to be sunny and cooler.
Environment and Climate Change